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Cover Page - USD ($)
$ in Billions
 12 Months Ended
Dec. 31, 2024
Feb. 14, 2025
Jun. 30, 2024
Cover [Abstract]      
Amendment Flag false    
Document Type 10-K    
Document Fiscal Year Focus 2024    
Entity Central Index Key 0000097210    
Document Fiscal Period Focus FY    
Current Fiscal Year End Date --12-31    
Entity Well-known Seasoned Issuer Yes    
Entity Voluntary Filers No    
Document Period End Date Dec. 31, 2024    
Entity Registrant Name TERADYNE, INC.    
Entity Filer Category Large Accelerated Filer    
Entity Public Float     $ 24.0
Trading Symbol TER    
Document Annual Report true    
Document Transition Report false    
Entity Interactive Data Current Yes    
Entity Current Reporting Status Yes    
Title of 12(b) Security Common Stock    
Security Exchange Name NASDAQ    
Entity File Number 001-06462    
Entity Incorporation, State or Country Code MA    
Entity Tax Identification Number 04-2272148    
Entity Address, Address Line One 600 RIVERPARK DRIVE    
Entity Address, City or Town NORTH READING    
Entity Address, State or Province MA    
Entity Address, Postal Zip Code 01864    
City Area Code 978    
Local Phone Number 370-2700    
Entity Small Business false    
Entity Emerging Growth Company false    
Entity Shell Company false    
Entity Common Stock, Shares Outstanding   161,718,766  
ICFR Auditor Attestation Flag true    
Auditor Name PricewaterhouseCoopers LLP    
Auditor Firm ID 238    
Auditor Location Boston, Massachusetts    
Document Financial Statement Error Correction [Flag] false    
Documents Incorporated by Reference [Text Block]

DOCUMENTS INCORPORATED BY REFERENCE

Portions of the registrant’s proxy statement in connection with its 2024 annual meeting of shareholders are incorporated by reference into Part III of this Form 10-K.

   
Auditor Opinion [Text Block]

Opinions on the Financial Statements and Internal Control over Financial Reporting

We have audited the accompanying consolidated balance sheets of Teradyne, Inc. and its subsidiaries (the "Company") as of December 31, 2024 and 2023, and the related consolidated statements of operations, of comprehensive income, of convertible common shares and shareholders' equity and of cash flows for each of the three years in the period ended December 31, 2024, including the related notes and schedule of valuation and qualifying accounts for each of the three years in the period ended December 31, 2024 appearing under Item 15(c) (collectively referred to as the "consolidated financial statements"). We also have audited the Company's internal control over financial reporting as of December 31, 2024, based on criteria established in Internal Control - Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission (COSO).

In our opinion, the consolidated financial statements referred to above present fairly, in all material respects, the financial position of the Company as of December 31, 2024 and 2023, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2024 in conformity with accounting principles generally accepted in the United States of America. Also in our opinion, the Company maintained, in all material respects, effective internal control over financial reporting as of December 31, 2024, based on criteria established in Internal Control - Integrated Framework (2013) issued by the COSO.